Doppler imaging of stellar surfaces - techniques and issues

Details Doppler imaging of stellar surfaces - techniques and issues Doppler imaging of stellar surfaces - techniques and issues

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002an....323..220r&link_type=abstract

Astronomische Nachrichten, vol. 323, no. 3/4, p. 220-235

Other

38

Techniques: Spectroscopic, Methods: Numerical, Stars: Spots, Stars: Activity

Scientific paper

The development of Doppler imaging has allowed us to observe stellar activity on the surface of stars other than the Sun for over a decade. We are now in a position to compare activity on rapidly rotating T Tauri, RS CVn and young main-sequence stars and to compare the activity on those, in turn, with that of the Sun. The images produced show some startling differences between stellar and solar activity. The strengths and weakness of the Doppler imaging technique must be reviewed regularly to remind us of what observed features are reliable and of when we should have doubts. This review is a general survey of the technique emphasizing the issue of testing and of potential artifacts without attempting excessive detail on variations in application or results. The difficulties faced as the technique is extended from images of surface temperature or abundance to images that include magnetic information are briefly surveyed.

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